Windshield cleaning system



July 3, 1962 E. c. HORTON 3, 2

' WINDSHIELD CLEANING'SYSTEM Original Filed March 11. 1954 4Sheets-Sheet 1 K H1. f7 :1 INVENTOR. l3

Rw/N C. HORTON /4 4/ /2 y A 7'TORNE VS.

July 3, 1962 E. c. HORTON WINDSHIELD CLEANING SYSTEM Original FiledMarch 11. 1954 4 Sheets-Sheet 3 INVENTOR. 6 E rw/n C. Horzon BY@u,@w%,@aawyf@m,

ATTORNEYS.

y 1962 Q E. c. HORTON 3,041,652,

WINDSI-IIELD CLEANING SYSTEM Original Filed March 11, 1954 v 4Sheets-Sheet 3 Fig/0 INVENTOR,

MYQM,

' TTOR/VEYS.

Erwin C. Horion July 3, 1962 E. c. HORTON WINDSHIELD CLEANING SYSTEMOriginal Filed March 11. 1954 4 Sheets-Sheet 4 my E MO m V C A .m N M E.

3,041,652 WINDSHIELD CLEANING SYSTEM Erwin C. Horton, Hamburg, N.Y.,assignor to Trico Products Corporation, Bufialo, NY.

Continuation of applications Ser. No. 415,544 and Ser.

No. 415,619, Mar. 11, 1954. This application July 7,

1958, Ser. No. 748,558

17 Claims. (Cl. 15250.02)

This invention relates generally to the window cleaning art, and morespecifically to a new and useful washing and wiping system particularlyadapted for the cleaning of vehicle Windshields.

This application is a continuation of applications 415,- 544 and 415,619filed March 11, 1954.

Heretofore, a plurality of manual operations were required to instituteand complete the windshield washing cycle, specifically, commencing theoperation of the washer, starting the wipers, shutting off the washerand stopping the wipers. Apart from the inconvenience to the operator ofthe vehicle resulting from the manipulation of the various controls, adistinct driving hazard exists due to the distraction of the operatorsattention from the road during the washing cycle. The need for a systemwhereby the washing cycle may be carried out with a minimum amount ofattention from the operator is obvious.

Accordingly, it is a primary object of this invention to provide a newand useful vehicle window cleaner wherein a wiper action is initiatedautomatically upon initiating a Window washing operation, the wipersalso being selectively operable independently of the washer.

Another object of this invention is to provide a window cleaning systemwherein the wipers are operated at full speed automatically uponactuating the washer.

It is also an object of this invention to provide a window cleaner unitas aforesaid and wherein at the end of the washing action the wipers'areautomatically restored to the parked or running condition for which theindependently operable wiper control is set.

A further object of this invention is to provide a vehicle windowcleaning system having the aforesaid characteristics and which is of arelatively simple and inexpensive construction.

A window cleaner system according to the invention is characterized bythe provision of a wiper unit including a wiper motor having a controlvalve movable between off and full running positions, first controlmeans for selectively actuating said control valve to initiate a wiperaction, a washer unit, second control means for selectively actuatingsaid washer unit to initiate a washing action, and third control meansinterconnecting the washer and wipe: units and automatically responsiveto actuation of the washer unit to move said control valve to a runningposition for high speed wiper operation during the washing operation,said third control means being operative to move said control valve fromits position prior to Washer actuation to such running position and backWithout relative movement in said first control means. I

More specifically, a window cleaner system according to the invention ischaracterized in one form thereof by the provision of a movable wipermotor control valve, a control cable therefor having a wire slidablewithin a casing and connected at one end to said control valve, theother end of said wire being connected to a first control member forselective actuation of the motor, a washer unit, a second control memberfor selectively actuating the washer .unit, meansresponsive to actuationof the Washer unit and connected to the control cable casing for movingthe control cable and the control valve bodily as a unit to place themotor control valve in full running position, and stop means positivelyprecluding movement of the motor 3,41,652 Patented July 3, 1962 controlvalve beyond its full running position, the means responsive toactuation of the washer unit being of sufficient strength to move thecable bodily as a unit without sufficient power to cause relativemovement between the wire and casing thereof.

In another form thereof, a window cleaning system according to theinvention is characterized by the provision of means enabling'overtravelof the motor control valve, beyond its full running position asdetermined by the first control means, without restriction of motorspeed because of such overtravel.

The foregoing and other objects and advantages of this invention willbecome clearly evident from the ensuing detailed description thereof,taken together with the accompanying drawing wherein:

FIG. 1 is a somewhat schematic view of one embodi ment of a windowcleaning system according to this invention installed in place on avehicle;

FIG. 2 is a schematic layout of the washer responsive wiper controlmeans of the system of FIG. 1, with the motor control valve shown infull running position; 1

FIG. 3 is a schematic fragmentary detail view similar to FIG. 2 butillustrating the motor control valve in parked position; a

FIG. 4 is a view similar to FIG. 3 but illustrating another. embodimentof the invention;

FIG. 5 is a schematic layout of still another embodiment of theinvention;

FIG. 6 is a fragmentary sectional view through the Washer responsivewiper control of FIG. 5;

FIG. 7 is a diagrammatic view of an automotive vehicle equipped withanother embodiment of a coordinating system constructedin accordancewith the present invention;

1 FIG. 8 is a fragmentary sectional view of the wiper motor valvecasing, taken on line VIIIVIII ofFIG. 10 and showing the control valvein its parked position;

FIG. 9 is a fragmentary elevational view of the wiper motor valvecasing, partly in section and showing the control valve in its full onposition;

FiG. 10 is a view taken'on line X-X of FIG; 9;

FIG. 11 is a sectional view of the bleed valve;

FIG. 12 is a detailed view of the Bowden cable connections at thecontrol valve;

FIGS. 13 and 14 illustrate additional forms of the invention; and.

FIGS. 15 and 16 show the manner in which the coordinator cable isactuated in the modified form of the invention illustrated in FIG. 14.

Referring now to the embodiment illustrated in FIGS. 1, 2 and 3, 1designates the vehicle windshield, 2 the cowl therebeneath, 3 theinstrument panel or shelf interiorly of the vehicle, and 4 the firewallseparating the motor compartment from the passenger compartment.

The wiper unit of this system comprises a power unit 5 herein shown as apneumatic motor, and a wiper 6 carried by an oscillating arm 7 which ismounted on a rock shaft 8 'journalled in a suitable housing 9 mounted onthe vehicle cowl 2. Motor 5 communicates with a' suitable source ofsuction, such as the intake manifold 10, through a conduit 10.

Motor 5 is connected to'rock shaft 8 by a suitable I transmissiongenerally designated 11, and is controlled by a valve 12 slidable on themotor casing and operated by V a cable comprising a wire 13' slidablethrough a casing iits between pinion16 and housing 17 to resilientlyrptain pinion 16 in its adjusted position.

Thus, it will be understood that by selectively rotating knob 19 valve12 will be moved from its parked position illustrated in FIG. 3, whereinthe wipers 6 are caused to assume a predetermined positionof rest, toits full runningposition illustrated in FIG. -2 or many positiontherebetween to cause a throttled wiper action.

The washer unit illustrated in this embodime t of the invention is morefully disclosed in Patent 2,743,473 issued May 1 19 56, and includes arese rvoir 23 for washing fluid and a pump in the form of a bellows 24mounted on firewall 4 as by a tubular fitting 25 and a lock nut 26.Bellows 24 is adapted to be compressed by a foot operated pedal 27pivoted on any pin 28 carried by a bracket 29 secured to firewall 4byfitting 25, and a spring 31 is provided for urging pedal27 to theposition illustrated in FIG. 1 permitting bellows'24to expand and drawin a charge of fluidfrom reservoir 23. A conduit 32 extends fromjfitting2S to a checkvalve unit 33 which communicates with reservoir 23 througha conduit 34 and with ;a discharge nozzle 35,'adapted to spray fluidonto wind- 7 shield 1, through a delivery conduit 36.

Check valve unit 33 is arranged so that when bellows 24 is compressed bydepressing pedal 27, the charge of fluid will be discharged therefromthrough fitting 25, conduit 32, check valve unit '33 and deliveryconduit 36 to lows 24 to expand and resume its normal shape, it willwithdraw a charged fluid from reservoir 23 through concharge of washingfluid.

' 7 Whereas in many conventional prior art systems it wouldbe necessaryfor the vehicle operator to depress 515117 to deliver a-charge of fluidto therwindshield and to rotateknob 19'to set the wipers'in motion, in asystem according to this invention the wipers are set in motionautomatically upon actuation of the Washer, as follows. I l A pair ofstop posts 40 are provided on the casing of motor in position to abut astop washer 41 carried by wire ,13 when control valve 12 assumes itsfull running prising a wire'42slidable through a casing43 interconnectsthebellows and the wiper motor, wire 42 being connected at one endthereof to pedal 27 and at its opposite end to a member 44 which isclamped to the adja- Ycent end of casing 14. Casing 43 is secured tobracket :29 and the casing of motor 5 by clamps 45' and'46, re-

spectively.

,nozzle 35, and when pedal 27 is released to permit belposition, asillustrated in FIG. 2. A second cable com- Upon depressing pedal 27 tocompress bellows 24 wire 421 will be pushed into its casing 43 whichlatter is of sufiicient strength to cause wire4 2 to slide therethrougharid, acting through clamp 44, to swing casing 14 and wire 13Iand carrythembodily as aunit to move control ll alve l2 to its full runningposition illustrated'in FIG. 2

.However, casing -43 is designed to have insutficient strength to eifectrelative movement between wire 13 and its casing'14 There is frictionbetween wire 13 and so that While it is of sufl'icient strength to causewire 42 toslide' therethrough and effect movement of fcasing 14, wire 13and valve 12 'as a unit, itis not sufliselective wiper operationindependently of the washer system.

Now, let it be assumed that the wipers are parked with valve 12 in theposition illustrated in FIG. 3, and that it is desired to initiate awindshield washing operation. The vehicle operator simply presses pedal27 downwardly with his foot and holds the same in that position, bellows24 being compressed thereby and functioning as previously described todeliver a charge of cleaning fluid in a steady flow through nozzle 35 toWindow 1. Simultaneously therewith, pedal 27 pushes wire 42 throughcasing 43 moving wire 13 and casing 14 bodily to the right in FIG. 3 andmove valve 12 to its full running position illustrated in'FIG. 2. Theparts are arranged so that movement of pedal 27 to its fully depressedposi tion' will cause movement of valve 12 to its full running position.The Washing operation continues until the fluid charge within bellows 24is depleted or until the vehicle operator releases his foot pressure onpedal 27, and upon releasing pedal 27, spring 31 retracts wire 42through casing 43 which action moves wire 13 and casing 14 bodily as aunit to retract valve 12 to its parked position illustrated in FIG. 3.Thus, the wiper action is stopped after the washer action, ensuring athorough wiping of the window.

'Ii wipers 6 are already running at full speed, valve 12 having beenmoved to its position in FIG. 2 by turning knob 19, and it is desired toinitiate a washing operation, the following action ensues. Asillustrated in FIG. 2, with valve 12 thusmoved to its full runningposition, washer 41 abuts against posts 40, or substantially so, wherebywire 13 and valve 12 are blocked against further movement in thisdirection. Pedal 27 is depressed to initiate the washingaction, causinga measured charge of fiuid' to be discharged from bellows 24 throughnozzle 35 onto window 1, and pushing wire 42 into casing 43-.

However, since wire 13 and valve 12 are'prohibited fi'om furthermovement by reason of washer 41 engaging against stop posts 40, andsince casing 42 is wound with a degree of tightness less than thatrequired to overcome the friction between wire 13 and casing 14 and inthe rack and pinion assembly such as to cause relative movement betweencasing 14 and wire 13, casing 43 opens with the convolutions thereofspreading apart as previously deset wiping action, and the wiperscontinue operating at full speed after the washing operation has stoppedand until varied by knob 19;

.When valve 12 has been moved by actuation of knob 191p a positionintermediate its parked and full running positions, as illustrated bythe broken line showing in "cie'ntlys trong to enable wire 42to overcomethe aforefriction such as to cause relative motion between etisiug andwire 13 once valve 12 is blocked against I 'move'ment'. Instead, uponwasher 41 abuttingagainst 'FIG. 2, whereby the wipers are running atthrottled speed,

upon initiating a washing action by depressing pedal 27, wire 42 ispushed into casing 43 which constrains the 'same to move casing 14 andwire 13 bodily as a unit until valve 12 is moved to its full runningposition illustrated .in FIG. 2 with washer 41 abutting stop posts 40 tostop further movementof valve 12 and wire 13 in this direc- "tion.Because of the preset throttled Wiping action with valve 12 in anintermediate position when the washer action is initiated, washer 41will abut posts '40 prior to completion of the pedal stroke. 'At thispoint, because casing 43 is wound with a degree of strength insuflicientto constrain wire 42 to cause relative movement between casing 14 andwire 13, the convolutions of casing 43 will expand and spread apmt asabove described to accommodate the further pushing movement of wire 42therein. When the pedal 27 is released, spring 31 will pull wire 42 topermit casing 43 to first resiliently contract to its normal conditionand wire 42 will then act through clamp 44 to move casing 14 and wire 13bodilyas a unit to retract valve 12. Inasmuch as the first part of thepedal releasing action simply restores casing 43 to its normalcondition, the movement of casing 14, wire 13 and valve 12 toward parkedposition will be only to the extent which they were moved to the fullrunning position, whereby valve 12 will be returned to its presetintermediate or throttled position. I

Thus, with an arrangement according to this invention, wherein movementof the motor control valve 12 beyond its full running position isprecluded and wherein the washer responsive control valve moving meansis designed with suficient strength to move the wiper control cable andthe motor control valve as a unit and insufficient to eflect relativemovement between the wiper control wire and its casing, full speedoperation of the wipers is provided automatically upon actuating thewasher unit, and

when the washing action is stopped the wipers are automatically restoredto the condition of operation for which they were previously set,whether it be parked or throttled. It will be noted that the wipercontrol cable casing 14 is provided with sufficient curvature betweenmotor '5 and its first point of anchorage on the vehicle to enable freeswinging movement thereof as a unit with wire 13 by wire 42 aspreviously described. If desired, a stop 47 can be provided for abuttingagainst valve 12, in place of the stops 4t engaging washer 41 on thewire 13, as shown in broken lines at 47 in FIGS. 2 and 3.

A window cleaner system according to this invention is also adapted forhydrostatic pressure operation. Thus, FIG. 4 illustrates a systemaccording to the invention wherein the motor 5 and the manually operatedwiper control comprising wire 13, casing 14, washer 41, valve 12 andstop posts 40 remain the same, and wherein a piston and cylinder unitactuated by hydrostatic pressure developed in the washer system uponoperation thereof is substituted for the pedal controlled cable ofFIG. 1. In this embodiment, a cylinder 50 is carried by the motor casing5, as by brackets 51, and a wall member in the form of a piston 52,mounted on a piston rod 53, is movable therein. Piston rod 53 is clampedto casing 14 by a member 44 for moving casing 14, wire 13and valve 12bodily as a unit in the manner above described in connection with theembodiment of FIG. 1 and piston 52 is mounted on rod 53 with apredetermined amount of friction sufiicient to move casing 14 and wire13 as a unit until washer 41 engages against posts 40 but insufficientto overcome the friction in the wiper control and cause relativemovement between casing 14 and wire 13. Piston 52 is actuated byhydrostatic pressure on one side thereof caused by fluid delivered underpressure through a conduit 36' which may extend from delivery conduit 36of FIG. 1, whereby as washing fluid is delivered under pressure from thewasher to the windshield a portion thereof is diverted through conduit36' to one side of piston 52. A retracting spring 54 is arranged on theopposite side of piston 52, which side is open to the atmosphere througha collar 55, and serves to automatically restore the wipers to theiroriginal condition of operation after the Washing operation whereby toensure thorough wiping of the window. Piston 52 is provided with a boss56 which bears against the end wall of cylinder 50 when the piston isfully retracted, and said piston bears against collar 55 when fullyextended.

The result achieved by this embodiment is the same as in the embodimentof FIG. 1. Should the wipers be parked when a washing action isinitiated, valve 12 being in the position illustrated in FIG. 4, thewashing fluid being discharged creates sufficient pressure againstpiston 52 to overcome the counter pressure of spring 54 and cause piston52 and piston rod 53 to move together in a direction causing clamp 44 tocarry casing 14 and wire 13 as a unit to move valve 12 to its fullrunning position. Upon cessation of the washing action, the fluidpressure is relieved and piston 52 is restored to the positionillustrated in FIG. 4 by spring 54. When the wipers have been preset forfull speed operation by knob 19, washer 41 will bear against stop posts40 to prevent movement of valve 12 beyond its full running position(FIG. 2) and upon initiating a washing action the hydrostatic pressureon piston 52 will cause the same to move along piston rod 53 because thefriction therebetween is designed to be less than the friction in thewiper control whereby to avoid relative motion between wire 13and itscasing 1-4. Thus, the wipers will not be disturbed and upon cessation ofthe washing action piston 52 will simply be moved in the oppositedirection along rod 53 by spring 54.

Rod 53 engages against the end wall of cylinder 50 and piston 52 thuswill be restored to its retracted position illustrated in FIG. 4 withthe wipers continuing to operate at full speed.

Should the wipers have originally been running in a throttled orintermediate speed position with valve 12 pcsitioned between its parkedand full running positions,

upon initiating a washing action the fluid pressure de veloped in thesystem will move piston 52 and rod 53 as a unit and they will actthrough clamp member 44 to move casing 14 and wire 13 bodily as aun ituntil valve 12-is moved to its full running position and washer 41engages stop posts 41). Piston 52 will not yet abut collar 55, and willcontinue movement in that direction but will now move along rod 53because valve 12 is stopped from further movement and the frictionbetween piston 52 and rod 53 is not sufficient to overcome the frictionin the control cable. Upon cessation of the washing action, spring 54will move piston 52 and rod 5'3 in the opposite direction until rod 53engages the end wall of cylinder 50 at which point valve 12 will berestored to its original throttled position, and because piston rod 53is positively prevented from further movement in this direction piston52 will move therealong until its boss 56 abuts the end wall of cylinder59. Thus, valve 12 is restored to its preset throt- Y tled positionwhile the wipers are automatically actuated at full speed during thewashing action. 1

Still another embodiment, utilizing a control valve acthe same asdescribed in connection with the embodiments of FIGS. 1-4. In thisembodiment, the washer unit may comprise a reservoir 61 for Washingfluid and a pump unit 61 as described more fully, for example, in Patent2,722,455 issued November 1, 1955. The pump 61 is actuated by suctionthrough a conduit 62 communicating with a conduit 63 extending to asource of suction such as the intake manifold of the vehicle. A controlvalve 64 which may be adapted for either manual or foot operation isplaced in "conduit 63 for selectively expo-sing the pump unit 61 to thesource of suction, the pump unit including a spring hacked plunger whichis retracted by suction influence to take in a charge of washing fluid,and then tripped to relieve the partial vacuum whereby the plunger isdriven by its spring to discharge the fluid charge through a deliveryconduit 6%, as described in said application. A chamber-defining casing65 carries a movable wall member in the form of a flexible diaphragm 66therein, and a conduit '67 places one side of diaphragm 66 incommunication with the source of suction through conduit 63 controlledby valve 64. This side of the diaphragm is also exposed to theatmosphere through a bleed valve 68 which is adjustable to selectivelyregulate the same. A rod 69, carried at one end by diaphragm 66, isconnected ."a't'its ppposite end to the clamp member .44, and a spring a71 urges diaphragm '66ag'ainst the end wall 70 of casing 65to retractrod 69 thereinto. Spring 71 is designed so that the total operatingpressure differential on diaphragm 66.is' suflicient {to move casing14.;and wire 13 as a unit, but is notsufiicient to overcome thefrictionforces in the wiper control cable such as to cause relativemotion therein 1 l In this embodiment, upon manipulating valve 64 toinitiate a washer action, the suction side of diaphragm 66 beevacu atedproducing a pressure differential on diaphragm 66 causing movementthereof against the bias of .s'pring 71;, Diaphragm 66 pushes rod 69 tocarry casing 14Fand wire .13 as a unit and move valve 12 to full runjning position.v Upon release of the suction effect, spring '71 ,willmove diaphragm 66 in the opposite directiori to retract rod 69 with thespeed of this movement being regulated by adjusting bleed valve '68. Byproper selecti'on of spring '71 and regulation of valve 68 the wiperscan be caused to continue operation for a predetermined period of'timeafter the washing operation, if desired. As

'diaphragrnfifi approaches the end wall 76 of casing 65 aproject ion 72thereon'unseats a valve 73 springbiased to normally close an opening indiaphragm 66. Upon unseating this valve the pressure on opposite sidesof the diaphragm will immediately equalize causing a quick finalmovement of diaphragm ,66 under the influence of spring 71 to quicklystop the wiping action. r

Should the wipers be set for full or intermediate operation prior toinitiating the washer action, this condition is automatically restoredafter the washing operation. If valve is in full running position withwasher 41 bearing against posts 40, upon initiating Washer action thepressure differential ondiaphragm '66 is not enough to move casing 14relative to wire 13-, whereupon diaphragm 66 will not move and thewipers will remain in full running operation following the washeroperation. Should the wipers have originally been set for throttledspeed operation, upon initiating a washing action diaphragm 66 will moverod 69, casing 14 and wire 13 only until washer 41 abuts posts 40, atwhich point movement of diaphragm would push wire 42 into its casing 43.

Referring now more particularly to FIGS. 7-16 of the drawings, the motormay be of the conventional variable speed pneumatic type such as thatdisclosed in Patent No. 2,298,734, October 13, 1942, or one similarthereto, deriving its power from the suction influence of the intakemanifold 1010f the vehicles engineby means of conduit Control of themotor is attained through the utilization of Bowden cable 13, 14attached to rack 15 and pinion 16 extending through the instrument panelfor manipulation from the'passenger' compartment of the vehicle.Rotation of the pinion results in'movement of control valve 12 from itsparked or off position shown in FIG. 8 to the on position of FIG. 9.When the latter position, air is withdrawn from the pressure chamber ofthe motor by the intaken manifold of'the engine via passageway 111,running valve 120, passageway 130, control valve 12', passageway 140 andconduit 10'. Concurrently, air is forced intothe opposite side of themotor through passageway 159. which is exposed to the atmosphere,control valve 12' and passageway 160. A vane, not shown, is as a resultforcedto move 7 toward the suction 'or low pressure side of the motor.

At the proper time, and in a manner fully described in patent 2,298,734,the running valve-is rotated so as to interconnect passageways 130 and150 while passageway .111 i's'exposed to the atmosphere. This results ina reversal of air flow, and the vane moves in the opposite direction.The above described cycle continues for so long as control valve 12'remains in the on position. Movement of the valve to its 0 positionresults in the closing of passageways and and the direct connection ofpassageway to the source of suction viatpassageway as is clearlyillustrated in FIG. 8. Therunning valve is as a'result lay-passed andthe wipers are held intheir parked position.

As is best seen in FIG. 12, one end of the wire of Bowden cable 181 istied to .the armored casing 14 while its opposite end is attached to thespring loaded diaphragm 190. As the resistance of the diaphragm isgreater than the internal friction of cable 13, 14, the casing of thelatter cable will be held stationary when its wire is movedlongitudinally by the-rack and pinion to operate valve 12'. i Closure ofswitch 290 completes an'electrical-circuit to solenoid valve 210 whichopens so as to make available the suction influence of manifold 10 topneumatically powered pump 220, the air flowing through conduit 230. Thepump draws fluid from reservoir 240 and deliversit under. pressure tonozzles 35 via conduits 260,

270 and 279'. .A jet stream of fluid is as a result directed on to theWindshield. For a more detailed description of the operation andconstruction of the above described washer reference may be made toPatent 2,746,652 issued May 22, 1956- Simultaneously with the flow ofliquid to the nozzles, some of thetfluid passes into chamber 280' viaconduit 290 and 'bleedvalve 300, the pressure of the fluid lifting plate310 against the resistance'gof'spring 320 and also deflecting diaphragm196 to the right against the resistance of spring 330. As one end of thewire 181 of Bowden cable is firmly attached to the diaphragm, thedeflection of thelatter will result in a longitudinal movement of thewire. Since the'opposite end of the wire is attached to the casing '14,said casing will also be urged tomove and asthe internal frictionbetween the wire .13

and casing 14 is of considerably greater magnitude than the slidingfriction occurring between the control valve 12 and surface of the valvecasing, thewire and valve will be forced to move with the casing 14. Inother words, any deflection of diaphragm will be reflected in alongitudinal movement of control valve 12', cables 180, 181 and 13,114being the transmitting media. The dimensions of chamber 280 and itsrelated elements are so designed that the magnitude of therefiected'movement of valve 12 is exactly equal to the distance betweenthe off? and full on position of the valve.

; It may therefore be seenthat the momentary depresfsionof switch 200will cause pump 220 to deliver a predetermined quantity of fluid to thewindshield. Simultaneously and due to the hydrostatic pressure of thefluid-diaphragm 190 deflects so as to move valve 12 'its-fullf'onposition shown in phantom in the same figin conjunction with the fluidwash the wind-shield ure. Wipers 6 will as a result commence oscillatingand clean of all sediment and'foreign deposits.

After a predetermined quantity of fluid has been delivered to thewindshield, pump 220 will, in a manner full described in the aboveidentified Patent 2,746,652, cease operating'and anyfluid remaining inthe lines will tend to return to reservoir 240; With the drop inhydrostatic pressure plate 310 moves back into contact with its seatunder the urging of spring 320, and the fluid returning to the reservoirfrom chamber 280 is compelled to pass'through restricted orifice 340.This results in a delay in return of diaphragm 190 to its normal 'undeflected position and a continuation'of operation of the fwipeis forseveral strokes after the cessation of fluid flow undeflected position,it pulls valve 12 back to its ofi position by means of cables 189, 181and 13, 14 so as to stop the motor and park the blades.

From an inspection of FIGS. 8, 9 and 10 it may be seen that the upperportion of passageway 130 has been enlarged at 43 to an extent whichwill permit the passageway to remain substantially unrestricted even ifvalve 12' is moved well beyond its normal full on position. If throttlevalve 12 is already in its full on position as illustrated in full linesin FIG. 9 when the washer is activated, it will nevertheless be moved tothe position indicated in phantom in FIG. 9, a distance equal to thatbetween the ofl and full on" positions since the dia phragm and cableswill be moved by the same amount regardless of the position of the valveat the commencement of the washing cycle. However, due to theenlargement of passageway 13%, this overtravel of the valve will have nodeliterious affect on the motor. The flow of air will remainunrestricted and the motor will continue to operate at full speed. Atthe termination of the washing cycle the valve will be pulled back toits normal full on position by the cables as the diaphragm returns toits undeflected state. It should be obvious that if the wiper motor isbeing operated in a partially throttled condition, with valve 12'located at some point between the extremes of off and full on,commencement of the washing cycle will cause the motor to operate at topspeed with the valve overtravelling its normal full on position by anamount equal to the distance between the ofl position and its partiallythrottled position. At the termination of the washing cycle the valvewill be returned to its partially throttled position since as statedabove diaphragm 190 will always deflect by the same amount and thenreturn to its normal undeflected position regardless of the location ofvalve 12' at the commencement of the cycle.

A modified form of the invention is shown in FIG. 13. Herein a manuallyoperated washer is employed in place of the electrically actuated washerof FIG. 7. In this form of the invention a suction bulb or bellows 24 islocated on the floor board 420 of the passenger compartment of thevehicle proximate to the head light dimmer switch. Conduit 32 connectsthe bellows and the washer while foot operated lever 27, pivoted at 28overlies the bellows. When the operator desires to clear the windshieldhe depresses lever 27 causing a similar depression of the bellows.Release of the lever causes fluid to be drawn from reservoir 240, pastvalve 33 into the bellows. When the lever is again depressed the fluidis ejected from the bellows to the nozzles and chamber 280. Theremainder of the washing cycle is as described above. For a moredetailed description of the washer employed in this form of theinvention resort may be had to Patent 2,717,556 issued September 13,1955.

In the form of the invention disclosed in FIGS. l4, l5 and 16, lever 27"is provided with an integral arm 40 to which the wire of Bowden cable180' is directly tied. The casing of cable 18 is held stationary bymeans of collar 45' rigid with the lever mounting plate 29. The oppositeend of the wire 181 of cable 184) is tied to the casing 14 in a manneridentical to that disclosed above; ratio of the length of lever 27 toarm 40 is such that a full depression of the lever will cause the arm toswing an amount suflicient to move valve 121 a distance equal to thatbetween its OE and full on positions. As in the previously disclosedforms of the invention, the valve will be moved this distance regardlessof its initial position, and will be returned to its initial position atthe termination of the washing cycle. It should further be noted thatherein a direct mechanical connection exists between the lever and valvewith no reliance being placed upon' The . 19 ment of fluid applicationto the windshield, the top speed operation of the wipers, thetermination of fluid flow after a predetermined amount of liquid hasbeen delivered, and the subsequent return of the wipers to the exactcondition of operation prevailing prior to the commencement of thewashing cycle all takes place automatically. The operator need onlymomentarily close a switch or depress a lever, neither operationrequiring the distraction of the operators attention from the road.

Accordingly,rit is seen that the instant invention fully accomplishesthe aforesaid objects and provides a highly practical, relatively simpleand completely reliable window cleaning system. While certain preferredembodiments have been set forth in detail herein as best illustratingthe invention, it is to'be understood that the invention is notnecessarily limited to the details thereof, and it is intended that thisinvention be defined by the scope of the appended claims.

Having fully disclosed and completely described this invention, togetherwith its mode of operatiom'what is claimed as new is: v

l. A windshield clearing system for automotive vebicles comprising, awiper, avariable speed motor for driving said wiper to and, fro acrossan associated windshield, a nozzle for directing a stream of fluidtoward the windsh eld, means for delivering fluid under pres-sure tosaid nozzle, a first control means for setting said motor in operationat a desired-speed and independently of said fluid delivery means, and asecond control means including hydrostatic means responsive to actuationof said fluid delivery means and mechanically tied to said first controlmeans for causing said motor to' run at top speed automaticallyconcurrently with operation of said fluid delivery means. 7

2. A'windshield clearing system for automotive vehicles comprising, awiper, a variable speed motor for driving said wiper to and fro acrossan associated windshield, a nozzle for directing a stream of fluidtoward said windshield, means for delivering the fluid under pressure tosaid nozzle, a first control'means for setting the motor in operation ata desired speed and independently of said pressure means, and a secondcontrol means mechanically tied to said first control means andincluding hydrostatic means for causing said motor to run at top speedconcurrently with the actuation of said pressure means, at thetermination of the washing operation said second control means returningsaid motor to the speed of operation prevailing prior to the actuationof said pressure means.

3. A windshield cleaning system for automotive vehicles comprising, awiper, a variable speed motor for driving said wiper to and fro acrossan associated wind shield, a nozzle for directing a stream of fluidtoward the windshield, a reservoir for storage of fluid, means includingan operator operated suction bulb operatively connected to saidreservoir for delivering fluid under pressure from said reservoir tosaid nozzle, a manually returning said motor to the speed of operationprevailing prior to the depression of said suction bulb.

4. A windshield clearing system for automotive vehicles comprising, awiper, a variable speed motor for driving said wiper to and fro acrossan associated windshield, a nozzle for directing a stream of fluidtoward said windshield, a reservoir for storage of the fluid, anoperator operated suction bulb operatively connected to the reservoirfor delivering fluid under pressure from said reservoir to the nozzle, afirst control means for setting the motor in operation at adesiredfspeed, a lever for depressing the suction bulb so as to ejectthe fluid con- V tained therein, -a second control means mechanicallytied a tea portion of said lever for setting the motor in operpressureon said movable wall member for pushing said second cable'wire into itscasing, said, second cable casing being of coiled form wound withsuflicient tightness to cause said second cable wire to efiect movementof said first cable as a unitfor moving said control valve to fullrunning position While stretching apart as necessary to I accommodatefurther pushing of said second cable wire reservoir for delivering fluidunder pressure from said res- I V ervoir to said nozzle, a first controlmeans for setting said motor in operation at a desired speedindependently pfsaid fiuid delivery means, and a second control meansmechanically tied to said first control means and automaticallyoperableto cause'said motor to run at. top speed concurrently with thedelivery of fluid by said suction bulb, a predetermined time after thetermination of the washing operation said second control meansreturning'said motor to the speed of operation prevailing pniorto suchdelivery of fluid. t

.6. A window cleaning system comprising a wiper motor adapted fordriving a wiper across awindow surface, a motor control valvemovablebetween parked and full running positions, stop means preventingmovement of said;control valve beyond full running position, firstcontrol means comprising a cable and a control member for selectivelymoving said control valve, said cable comprising a wire movable Within afleXible casing and operatiyely connected at one end to said controlvalve and at, its other end to said control member, a washer unit havingmeans for delivering washing fluid to a window surface, second controlmeans including a second control member for selectively actuating saidwasher unit, .andmeans responsive to operation of said washer unit forautomatically initiating a wiper operation during the washer operation,said last-named 'means comprising ,a

second cable having a wire movable within a casing, said secondwirebeing operatively connected at its opposite ends to said first cablecasing and to said second control emperrdr' being pushed by the latterinto said second casing, said second casing being of coiled form woundwith a suificient degreetof tightness to.constrain said second wire tomove said first cable and said control valve as a unit while resilientlyyielding by spreading apart to accommodate further pushing of saidsecond wire therein after said control valve is in full runningposition, whereby to prevent relative movementrin said first controlmeans, andmeans for-retracting said second wire through its casingftorestore said control valve to its position prior to actuation of thewasher unitas determined by said first control member.

7. Awindowcleaning system comprising acwiper motor adapted for driving awiper across a window surface, a

c niotorcontrol valve movable between parked and full run.- ningposition, stop means preventing movement of 'said control valvebey ondfull running position, first control means comprising a first cable anda first control member rarseneavaymnng said control valve, said firstcable comprising a wire movable withinaflexible casing and op- -eratively connected atone end to said control valve and at its other end tosaid first control member, a washer unit Having means for deliveringwashing fluid to a window surface, second control .means including asecond con- .trol imember forfs elective'ly actuating. said washer unit,and means responsive to operation of said washer unit for automaticallyinitiating a wiper operation during the washes operation, saidlast-named means comprising a second cable having a wire movable withina casing, said end thereof to said first cable casing and at itsopposite end to a movable-wall member, means responsive to .actuation'of saidwasher unit for creating an operating second cable wire being:operatively connected atone" 'full running positions, stop meanspreventing movement of said control valve beyondfull running position, afirst control cable comprising a wire slidable within a casing.

and operatively connected at one end to said control valve, a firstcontrol member operatively connected to the other end of said wire forsliding the same within said casing to selectively position said controlvalve, said first cable being arranged at its end adjacent said motorfor movement as aunit, a reservoir for washing fluid, a pumpsfor washingfluid comprising tacollapsible bellows member, a discharge nozzlearrangedfor depositing washing fluid o'ntthe vehicle windshield, meansincluding check valve means whereby said bellows member will take in acharge of fluid from said reservoir when expanded and will deliver thesameto said discharge nozzle when collapsed, a second'control member forcollapsing said bellows to selectively initiate a washing'operation,and'means for initiating a wiper operation automatically upon initiatinga washer operation comprising a second control cable having a casing ofcoiled form and a wire slidable therein, said second cable wire beingoperatively connected at .one end to said first cable casing and at itsother end to said second control member for being pushed thereby intosaid second casing upon movement of said second control member tocompress said bellows and initiate a washer operation, said second cablecasing being of sufiicient strength :to cause said second cable wire tomove said first cable as a unit and thereby slide said control valve tofull running position while being wound with a degree of tightness belowthat required to produce relative movement in said first cable, theconvolutions of said second cable casing spreading apart as necessary toaccommodate continued pushing of said second cable wire therein uponsaidcontrol valve reaching its full running position, and ,meansautomatically retracting said second cable wire to subsequently restoresaid control valve to its original position as determined by said firstcontrol member. I V

v} 9. A window cleaning system com prising, in combination a wiper unithaving-a wiper and means including a motor for driving said wiper, motorcontrol means movable -between full on and ofi positions, firstactuating meansfor moving said control means between on and ofipositions to selectively actuate said wiper unit, a washer unit havingmeans for delivering washing fluid to a window in the path of saidwiper, second actuating means for selectively actuating said washerunit, said first ac tuating means being operableindependently of saidsecond actuating means, and means responsive to actuation of .saidwasherunit by said second actuating means for movbeing pushed through saidcasing to move said control 13 unit and said casing resilientlyexpanding to accommodate further pushing of said wire therein when saidcontrol means is in full on position.

10. A window cleaning system comprising a wiper motor adapted fordriving a wiper across a window surface, a motor control valve slidableon the motor casing between parked and full running positions, firststop means carried by said motor casing, first control means 14. shieldby said motor, a nozzle for directing a stream of fluid toward thewindshield, means for delivering fluid under pressure to said nozzle, afirst control means operatively connected to said control valve formoving the same relative to said seat to set said motor in operation ata desired speed independently of said fluid delivery means, and a secondcontrol means responsive to actuation of said fluid delivery means andmechanically tied to said first comprising a cable and a control memberfor selectively moving said control valve, said cable comprising'a wiremovable within a flexible casing and operatively connected at one end tosaid control valve and at its other end to said control member, secondstop means carried by said wire for abutting said first stop means toprevent movement of said control valve beyond full running position, awasher unit having means for delivering washing fluid to a windowsurface, second control means for selectively actuating said washerunit, and means responsive to operation of said washer unit forautomatically initiating wiper operation during washer operation, saidlast-named means being operatively connected to said cable casing andoperable to move said cable bodily as a unit for moving said controlvalve from its position as determined by said first control member tofull running 7 position and then back again while being inoperable toovercome the friction in said first control means and cause relativemovement therein.

11. A window cleaning system comprising a wiper motor adapted fordriving a wiper across a window surface,

a motor control valve movable between parked and full running positions,stopmeans preventing movement of said control valve beyond full runningposition, first control means comprising a cable and a control memberfor selectively-moving said control valve, said cable comprising a wiremovable within a flexible casing and operatively connected at one end tosaid control valve and at its other end to said control member, a washerunit having means for delivering washing fluid to a window surface,second control means for selectively actuating said washer unit, andmeans responsive to operation of said washer unit for automaticallyinitiating wiper operation during washer operation, said last-namedmeans being operable to move said cable bodily 'as a unit for movingsaid control valve from its position as determined by said first controlmember to full running position and then back again and comprising a rodclamped adjacent one end thereof to said cable casing, a movable wallmember operatively connected to said rod adjacent the opposite endthereof for moving the same, means for producing a fluid pressuredifferential on said wall member in response to operation r of saidwasher unit for moving said wall member in one direction to push saidrod and move said control valve to full running position, and springmeans biasing said wall member for return movement in the oppositedirection, said spring means being designed to provide in conjunc tionwith said pressure differential a total operating pressure against saidwall member suflicient to move said cable and said control bodily as aunit while being less than that required to produce relative movement insaid cable, together with adjustable bleed means for relatively slowlyrelieving the fluid pressure differential on said wall member, and valvemeans operable upon predetermined return movement of said wall member bythe action of said spring means to quickly equalize the fluid pressureon opposite sides of said wall member.

12. A windshield clearing system for automotive vehicles comprising, avariable speed fluid operated motor having a plurality of fluidpassageways opening through a valve seat, a control valve slidable onsaid seat, the crosssection of a portion of at least one of saidpassageways adjacent said valve seat being larger than thecross-sections of said other passageways to enable overtravel of saidcontrol valve beyond its full on position relative to said valve seatsubstantially without restricting said one passageway, a wiperoperatively connected to said motor so as to be driven to and fro acrossan associated windcontrol means for causing the same to move saidcontrol valve relative to said seat to cause said motor to run at topspeed automatically concurrently with the actuation of said fluiddeliveryzmeans.

13. A windshield clearing system for automotive vehicles comprising, avariable speed fluid operated motor having a plurality of fluidpassageways opening through a valve seat, a control valve movable onsaid seat, the cross-section of the seat portion of at least one of saidpassageways being larger than the cross-sections of said otherpassageways, a wiper operatively connected to said motor so as to bedriven to and fro across an associated windshield by said motor, anozzle for directing a stream of fluid toward said windshield, means fordelivering the fluid under pressure to said nozzle, a first controlmeans for moving said valve on said seat to set the motor in operationat a desired speed and independently of said pressure means, and asecond control means operatively connected to said first control meansand including hydrostatic means for moving said valve on said seat tocause said motor to run at top speed concurrently with the actuation ofsaid pressure means, at the termination of the washing operation saidsecond control means returning said motor to the speed of operationsprevailing prior to the actuation of said pressure means, said largerpassageway portion enabling overtravel of said valve on said seatsubstantially without restricting said one passageway.

14. A windshield clearing system for automotive vehicles comprising, avariable speed fluid operated motor having a plurality of fluidpassageways opening through i a valve seat, a control valve movable onsaid seat, the

cross-section of the seat portion of at least one of said passagewaysbeing larger than the cross-sections of said other passageways, a wiperoperatively connected to said motor so as to be driven to and fro acrossan associated windshield by said motor, a nozzle for directing a streamof fluid toward the windsheild, a reservoir for storage of fluid, anoperator operated suction bulb operatively connected to said reservoirfor delivering fluid under pressure from said reservoir to said nozzle,a first manually operable control means for moving said valve on saidseat to set said motor in operation at a desired speed, and a sec- Y 0ndcontrol means mechanically tied to said first control means for causingthe same to move said valve on said seat to cause said motor to run attop speed whenever said suction bulb is depressed, at the termination ofthe washing operation said second control means returning said motor toits speed of operation prevailing prior to the depression of saidsuction bulb, said larger passageway portion enabling overtravel of saidvalve on said seat substantially without restriction of said onepassageway.

15. A windshield clearing system for automotive vehicles comprising, avariable speed fluid operated motor having a plurality of fluidpassageways opening through a valve seat, a control valve movable onsaid seat, the cross-section of the seat portion of at least one of saidpasageways being larger than the cross-sections of said otherpassageways, a wiper operatively connected to said motor so as to bedriven to and fro across an associated windshield by said motor, anozzle for directing a stream of fluid toward the windshield, areservoir for storage of fluid, means including an operator operatedsuction bulb operatively connected to said reservoir for deliveringfluid under pressure from said reservoir to said nozzle, a first controlmeans operatively connected to said control valve for moving the same onsaid seat and thereby setting said motor in operation at a desiredspeed, a lever for depressing said suction bulb so as to eject the fluidcontained therein, a second control means mechanically tied to a portionof said lever and to said first control means for moving said, valve onsaid seat and thereby setting said ,motor in operation at top speedwhenever said lever is depressed, upon release of said lever said secondcontrol means returning said motor to its speed of operation prevailingprior to the depression of said suction bulb, said larger passagewayportion enabling overtravel of said valve on said seat substantiallywithout restriction of said one passageway.

16. A windshield clearing system for automotive. ve-

hicles comprising, a variable speed fluid operated motor having aplurality of fluid passageways opening through valve seat, a controlvalve movable on said seat, the crosssection of the seat portion of atleast one of said passageways beinglarger than the cross-sections ofsaid other passageways, a wiper operatively connected to said motor soas to be driven to and fro across an associated windshield by saidmotor, a nozzle for directing a stream of fluid toward the windshield, areservoir for storage of fluid, means including an operator operatedsuction bulb operatively connected to said reservoir for deliveringfluid under presa valve seat, a control valve movable on said seat, the

cross-section of the seat portion of at least one of said pas sagewaysbeing larger than thetcross-sectio'ns of said other passageways, a wiperoperative'ly connected to said motor so as to be driven to and froacross an associated winda shield by said motor, a nozzle for directinga stream of fluid toward the Windshield, electrically actuated means fordelivering the fluid under pressure to the nozzle, and control meansincluding hydrostatic means for moving said valve on said seat andthereby setting the motor in opera-v tion at top speed when saidpressure means commences to deliver fluid, a predetermined time afterthe termination of motor to the speed of operation prevailing prior tothe delivery of fluid by said pressure means said larger passage- 7 wayportion enabling over'travel of said valve on said seat substantiallywithout restriction of said one passageway.

17. A windshield clearing system for automotive vehicles comprising, avariable speed fluid operated motor having a plurality of fluidpassageways opening through a the washing operation said control meansreturning said sure from said reservoir to said nozzle, a first controlmeans operatively connected to said control valve for moving the same onsaid seat, and thereby setting said motor in operation at a desiredspeed, and a second control means responsive to operation of saidsuction bulb for moving said valve on said seat and thereby causing saidmotor to run at top speed automatically concurrently with p the deliveryof fluid by said suction bulb, a predetermined time after thetermination of the washing cycle said second control means returningsaid motor to its speed of operation prevailing prior .to the deliveryof fluid said larger passageway portion enabling overtravel of saidvalve on said seat substantially without restriction of said onepassageway. 1

References Cited in the file of this patent UNITED STATES PATENTS OisheiMar. 17, 1959

